【Features】-Accurate Angle Measurement Tool: Perfect for precise and accurate angle measurements.-High Quality Aluminum Alloy Material: Durability and resistant to scratch, corrode etc.-IN & CM Angles measurements: All arms are dual-calibrated in inches and metric measures.-High-efficiency: You can save more time because angle ruler can be set-up in seconds.-Multifunctional Ruler: Can be set to mark bricks, tiles, lumber and laminates. Perfect for builders, craftsmen, weekend warriors and DIY-ers.-Portable and Ergonomic: Unique tightening mechanism for one-handed operations.